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(Color online) Schematic diagrams of the experimental configuration (a) and sample illumination (b).
(Color online) The scattering laser spots and SHG images of the pump and probe lights on the QWs. (a) and (b) are the illustrations of the pump and probe lights; (c) and (d) are the images of the pump and probe spots at the fundamental wavelength; (f) and (g) are that at double frequency wavelength; (e) and (h) show the intensity distributions of the pump and probe lights along axis, at the fundamental and double frequency wavelengths, respectively.
(Color online) The spatial intensity distributions of the pump-induced changes of the SHG (a), the corresponding three-dimensional image (b), and the values along axis with pump-probe delay and (c).
(Color online) The intensity distribution of the polarization on the sample surface under the injection of the horizontal polarized pump laser and the detection of the right (a) and left (b) circular polarized probe laser beams; the effective electric field (c) and magnetic field (d) can then be calculated. (e) shows the effective electric field along axis and (f) shows the effective magnetic field along axis.
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